3986401 has 4 divisors (see below), whose sum is σ = 4079152. Its totient is φ = 3893652.

The previous prime is 3986393. The next prime is 3986413. The reversal of 3986401 is 1046893.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1046893 = 73 ⋅14341.

It is a cyclic number.

It is not a de Polignac number, because 3986401 - 2³ = 3986393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3986431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46311 + ... + 46396.

It is an arithmetic number, because the mean of its divisors is an integer number (1019788).

Almost surely, 2^3986401 is an apocalyptic number.

It is an amenable number.

3986401 is a deficient number, since it is larger than the sum of its proper divisors (92751).

3986401 is an equidigital number, since it uses as much as digits as its factorization.

3986401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92750.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 3986401 is about 1996.5973555026. The cubic root of 3986401 is about 158.5600087238.

The spelling of 3986401 in words is "three million, nine hundred eighty-six thousand, four hundred one".